Jeffrey Sun
@jeffreysun.bsky.social
Climate Economist at the University of Toronto. Views are neither the University's nor even my own, but a product of historical forces beyond my comprehension.
I can't wait until ascending into an intergalactic civilization with interstellar travel at relativistic speeds finally solves the age-period-cohort identification problem
November 6, 2025 at 3:54 PM
I can't wait until ascending into an intergalactic civilization with interstellar travel at relativistic speeds finally solves the age-period-cohort identification problem
I am sometimes asked which single impact of climate change I think will be worst. I usually say that nothing keeps me up at night as much as Bangladesh. A country with over 174 million people (more than Canada, Italy, and the UK combined) living in an area less than one third the size of California.
June 16, 2025 at 8:52 PM
I am sometimes asked which single impact of climate change I think will be worst. I usually say that nothing keeps me up at night as much as Bangladesh. A country with over 174 million people (more than Canada, Italy, and the UK combined) living in an area less than one third the size of California.
Conversation I just had walking home around Columbia University:
Cop: "You can't go through here."
Me: "Why, is it illegal?"
"This street is closed."
"I don't understand, is it illegal for me to go through?"
"I'll stop you if you do."
"Right, but is it against the law? This is a public street."
1/
Cop: "You can't go through here."
Me: "Why, is it illegal?"
"This street is closed."
"I don't understand, is it illegal for me to go through?"
"I'll stop you if you do."
"Right, but is it against the law? This is a public street."
1/
May 8, 2025 at 1:16 AM
Conversation I just had walking home around Columbia University:
Cop: "You can't go through here."
Me: "Why, is it illegal?"
"This street is closed."
"I don't understand, is it illegal for me to go through?"
"I'll stop you if you do."
"Right, but is it against the law? This is a public street."
1/
Cop: "You can't go through here."
Me: "Why, is it illegal?"
"This street is closed."
"I don't understand, is it illegal for me to go through?"
"I'll stop you if you do."
"Right, but is it against the law? This is a public street."
1/
Someone: "I wish that America would serve as an example to countries around the world"
Monkey's paw: "As you wish"
Monkey's paw: "As you wish"
April 29, 2025 at 3:11 AM
Someone: "I wish that America would serve as an example to countries around the world"
Monkey's paw: "As you wish"
Monkey's paw: "As you wish"
I urgently encourage everyone, everywhere to read Stephen Miller's full account of his deportation plans
Key points:
- "Large-scale staging grounds near the border"
- Large-scale raids across the country
- Deputizing red state National Guards to raid in red and blue states
- 10 million deportations
Key points:
- "Large-scale staging grounds near the border"
- Large-scale raids across the country
- Deputizing red state National Guards to raid in red and blue states
- 10 million deportations
April 28, 2025 at 8:09 PM
I urgently encourage everyone, everywhere to read Stephen Miller's full account of his deportation plans
Key points:
- "Large-scale staging grounds near the border"
- Large-scale raids across the country
- Deputizing red state National Guards to raid in red and blue states
- 10 million deportations
Key points:
- "Large-scale staging grounds near the border"
- Large-scale raids across the country
- Deputizing red state National Guards to raid in red and blue states
- 10 million deportations
Reposted by Jeffrey Sun
I said my main goal of this trip was to meet with Kilmar. Tonight I had that chance. I have called his wife, Jennifer, to pass along his message of love. I look forward to providing a full update upon my return.
April 18, 2025 at 1:02 AM
I said my main goal of this trip was to meet with Kilmar. Tonight I had that chance. I have called his wife, Jennifer, to pass along his message of love. I look forward to providing a full update upon my return.
New dystopia just dropped
(Currently #3 in my personal list of most dystopian papers, after the one showing that congress members vote for war more often after their sons leave conscription age, and the one measuring what happens to patients when private equity firms acquire elder care facilities)
(Currently #3 in my personal list of most dystopian papers, after the one showing that congress members vote for war more often after their sons leave conscription age, and the one measuring what happens to patients when private equity firms acquire elder care facilities)
April 14, 2025 at 2:11 PM
New dystopia just dropped
(Currently #3 in my personal list of most dystopian papers, after the one showing that congress members vote for war more often after their sons leave conscription age, and the one measuring what happens to patients when private equity firms acquire elder care facilities)
(Currently #3 in my personal list of most dystopian papers, after the one showing that congress members vote for war more often after their sons leave conscription age, and the one measuring what happens to patients when private equity firms acquire elder care facilities)
This is really, really stupid. And the first thing I've seen since the US election that could really hurt the LPC.
They need to immediately fire those responsible and completely disavow this kind of thing to regain a credible claim to respectability.
www.cbc.ca/news/politic...
They need to immediately fire those responsible and completely disavow this kind of thing to regain a credible claim to respectability.
www.cbc.ca/news/politic...
Liberal operatives planted 'stop the steal' buttons at conservative conference | CBC News
Two Liberal Party staffers attended last week's Canada Strong and Free Networking Conference where they planted buttons that used Trump-style language and highlighted division within the Conservative ...
www.cbc.ca
April 13, 2025 at 8:27 PM
This is really, really stupid. And the first thing I've seen since the US election that could really hurt the LPC.
They need to immediately fire those responsible and completely disavow this kind of thing to regain a credible claim to respectability.
www.cbc.ca/news/politic...
They need to immediately fire those responsible and completely disavow this kind of thing to regain a credible claim to respectability.
www.cbc.ca/news/politic...
This is very disappointing to see. I have some research funds to spare -- if any Canadian climate scientists lack travel funding for the IPCC, please contact me and I will try to help out.
www.cbc.ca/news/science...
www.cbc.ca/news/science...
Canada will no longer cover travel costs of experts it nominates to UN's climate science body | CBC News
In a sudden and unexplained change from previous decades, the federal government has stopped covering the travel costs of Canadian experts volunteering for the next major global climate science assess...
www.cbc.ca
April 12, 2025 at 5:45 PM
This is very disappointing to see. I have some research funds to spare -- if any Canadian climate scientists lack travel funding for the IPCC, please contact me and I will try to help out.
www.cbc.ca/news/science...
www.cbc.ca/news/science...
How delulu is it to expect the U.S. to bring "Chinese peasants" to their knees through tariffs?
1. China's GDP (PPP) is larger than the U.S., Canada, Mexico, and Australia combined.
2. Exports to the U.S. account for 2.8% of Chinese GDP.
1. China's GDP (PPP) is larger than the U.S., Canada, Mexico, and Australia combined.
2. Exports to the U.S. account for 2.8% of Chinese GDP.
April 8, 2025 at 3:42 PM
How delulu is it to expect the U.S. to bring "Chinese peasants" to their knees through tariffs?
1. China's GDP (PPP) is larger than the U.S., Canada, Mexico, and Australia combined.
2. Exports to the U.S. account for 2.8% of Chinese GDP.
1. China's GDP (PPP) is larger than the U.S., Canada, Mexico, and Australia combined.
2. Exports to the U.S. account for 2.8% of Chinese GDP.
White House last week: We are going to make you richer than rich, every American will travel to work in a self-driving golden chariot that runs on caviar and rubies
White House this week: Insincere of Americans to ask for more money when they already have access to the noble potato
White House this week: Insincere of Americans to ask for more money when they already have access to the noble potato
April 7, 2025 at 7:02 PM
White House last week: We are going to make you richer than rich, every American will travel to work in a self-driving golden chariot that runs on caviar and rubies
White House this week: Insincere of Americans to ask for more money when they already have access to the noble potato
White House this week: Insincere of Americans to ask for more money when they already have access to the noble potato
Great to see how much movement there is in the U.S. right now! Even if it's a little disappointing that the stock market got people out where the ethnic cleansing did not
April 5, 2025 at 10:58 PM
Great to see how much movement there is in the U.S. right now! Even if it's a little disappointing that the stock market got people out where the ethnic cleansing did not
As an economist who studies housing among other things, "You can't have cheap housing unless the government admits a large number of unskilled immigrants" is not only wrong, it sounds like a hostage negotiation.
www.cbc.ca/news/canada/...
www.cbc.ca/news/canada/...
Why Canada is on the cusp of a housing construction crisis | CBC News
Housing is about to get a lot more expensive in the next decade if the federal government’s immigration program bringing in skilled workers isn’t revamped. Many in the construction industry say there ...
www.cbc.ca
April 5, 2025 at 10:58 PM
As an economist who studies housing among other things, "You can't have cheap housing unless the government admits a large number of unskilled immigrants" is not only wrong, it sounds like a hostage negotiation.
www.cbc.ca/news/canada/...
www.cbc.ca/news/canada/...
Wikipedia currently lists the president of USIP as "Disputed." But it's still not a coup, right?
April 1, 2025 at 1:57 AM
Wikipedia currently lists the president of USIP as "Disputed." But it's still not a coup, right?
Maybe the most radical opinion I have is: I really think they are going to deliberately and irrevocably destroy the SSA, IRS, and treasury codebases.
I don't think many people realize that or understand what it will mean
The state effectively ceases to exist when it can no longer process payments.
I don't think many people realize that or understand what it will mean
The state effectively ceases to exist when it can no longer process payments.
March 31, 2025 at 10:45 PM
Maybe the most radical opinion I have is: I really think they are going to deliberately and irrevocably destroy the SSA, IRS, and treasury codebases.
I don't think many people realize that or understand what it will mean
The state effectively ceases to exist when it can no longer process payments.
I don't think many people realize that or understand what it will mean
The state effectively ceases to exist when it can no longer process payments.
The BBC has a hard time spelling "victim" apparently
March 31, 2025 at 9:15 PM
The BBC has a hard time spelling "victim" apparently
"Quantify" is overused in econ papers. Next time, consider "numberize" or "magnitudinate."
March 27, 2025 at 4:05 PM
"Quantify" is overused in econ papers. Next time, consider "numberize" or "magnitudinate."
Welcome @timothysnyder.bsky.social to the University of Toronto! Looking forward to working at the same wonderful institution as you.
March 26, 2025 at 5:34 PM
Welcome @timothysnyder.bsky.social to the University of Toronto! Looking forward to working at the same wonderful institution as you.
Reposted by Jeffrey Sun
🆕 JOB AD! 🆕
TARIFFS are here. More are coming.
Do you love working with DATA and making CHARTS?
Do you want to use ECONOMICS in real time?
@piie.com is hiring a Research Analyst for International Trade. Come and work for/with me.
APPLY today 👉 www.linkedin.com/jobs/view/41...
TARIFFS are here. More are coming.
Do you love working with DATA and making CHARTS?
Do you want to use ECONOMICS in real time?
@piie.com is hiring a Research Analyst for International Trade. Come and work for/with me.
APPLY today 👉 www.linkedin.com/jobs/view/41...
March 21, 2025 at 2:35 PM
To put this as crisply as possible: DOGE used mercenaries to storm a building owned by the US military.
Inter-con, USIP security contractor, had contract terminated by USIP but still had one physical key to building. DOGE went to contractor VP's house and said "you either let us in or we're gonna cancel all your other government business." Inter-con then turned on USIP, and used key to let DOGE in.
March 20, 2025 at 5:11 PM
To put this as crisply as possible: DOGE used mercenaries to storm a building owned by the US military.
Incredible doublespeak from the administration: apparently NOT having a criminal record is highly suspicious. I'd better start committing crimes!
March 19, 2025 at 3:54 PM
Incredible doublespeak from the administration: apparently NOT having a criminal record is highly suspicious. I'd better start committing crimes!
They have not even released the names of the 259 people they sent to die in that hole
March 17, 2025 at 5:01 PM
They have not even released the names of the 259 people they sent to die in that hole
It's almost like these guys heard that empires fall after 250 years and they're scrambling to meet that 2026 deadline
March 17, 2025 at 3:55 PM
It's almost like these guys heard that empires fall after 250 years and they're scrambling to meet that 2026 deadline
The most dystopian quote I've seen recently is a private prison operator advertising their services as a detention camp for ICE
March 13, 2025 at 1:10 AM
The most dystopian quote I've seen recently is a private prison operator advertising their services as a detention camp for ICE
Reposted by Jeffrey Sun
In Nature Climate Change, @chrisbataille.bsky.social and I describe three common situations when energy/economic models are detrimental to climate policymaking efforts 🧵
rdcu.be/ecSMX
rdcu.be/ecSMX
Avoiding misuses of energy-economic modelling in climate policymaking
Nature Climate Change - Energy-economic models are increasingly being used to inform climate mitigation policies. This Comment describes three situations where models misinform policymakers and...
rdcu.be
March 11, 2025 at 3:00 PM
In Nature Climate Change, @chrisbataille.bsky.social and I describe three common situations when energy/economic models are detrimental to climate policymaking efforts 🧵
rdcu.be/ecSMX
rdcu.be/ecSMX